Insulator.



W. J. CURRY & W. A. ANDREWS.

INSULATOR.

APPLICATION FILED MN. I, 1915.

1,177,996. Patented Apr. 4, 1916.

3 4Q {a 15' N WI Carr Wflflndrews,

- I afl'omm t CO., WASHINGTON, D- C.

, UNITED STATES PATENT OFFICE.

WILLIAM J. CURRY AND WILLIAM A. ANDREWS, OF EAST LIVERPOOL, OHIO.

INSULATQR.

a To all whom it may'concern:

Be it known that we, WILLIAM J. CURRY and WILLIAM A. ANDREWS, citizensof the United States, residing at East Liverpool, in the county ofColumbiana and State of Ohio, have invented certain new and usefulImprovements in Insulators, of which the following is a specification.

T his invention relates to electrical insulators, and more particularlyto that class comprising two counter part sections arranged, whenassembled, to grip and hold between them the wire to be supported andinsulated. Ordinarily, such devices are provided axially with a nailopening and'in their opposing faces at each side of the said openingwith wire receiving grooves or similar wire gripping surfaces. Such aconstruction presents the disadvantage, however, that the insulation isliable to be worn from the wire allowing the wire to come tact with thenail.

7 without likelihood of becoming fractured 4O will be firmly andsecurely gripped and held or chipped. I

.-Another aim of the invention is to so form the wire gripping surfacesof the sections comprising-the insulator that the wire against slippingand yet without likelihood of the'insulation being damaged.

In the accompanying drawings: Figure 1. is a perspective view of theinsulator embodying the present invention. Fig. 2 is a verticalsectional view through the insulator, the sections being shownassembled. Fig. 3 is a similar view illustrating the securing nail andthe wire also assembled with the sections. Fig. 4 is a group perspectiveview of the sections in position about to be assembled. Fig; 5 is aperspective view illustrating the manner .in which the conductor wiremay be afforded additional support.. f

Specification of Letters Eatent Patented Apr. 4, 1916.

Application filed January 7, 1915. Serial No. 1,008. g

Corresponding and like parts arereferred to in the following descriptionand indicated in all the views of the accompanying drawings by the samereference characters. I

As before stated, the insulator embodying the present inventioncomprises counterpart sections between which the conductor wire is to begripped. Each of the said sections comprising the insulator includes abody portion 1 which may be cylindrical, as here shown, or rectangular,as may be desired,

for approximately one-half its length. Throughout the remaining portionof its length, the outer surface of the section is substantiallysemi-cylindrical, the flat face 2 thereof,however, being inclined andoccupying a plane bisecting the longitudinal axis of the section. Thislast mentioned portion of the section is indicated by the numeral 3. Theend face of the portion 3 and the inner end face of'the body portion 1constitute the wire gripping surfaces of the section, and the said faceof the body portion 1 is formed with :a substantially semi-annulargroove 4 which terminates at its ends at the' base of the inclined side2 of the portion 3. This groove results in a semi-annular grippingflange 5 which ex.- tends at the outer edge of the said end face oftheportion 1 and which of course constitutes one wall of the said groove.The other wall of the groove is'defined by the surface of a boss 6 whichis concentric to the said flange'5. A nail opening 7 is formed in theportion 1 of the section and opens through the bottom of the groove 4and through the under or outer face of the said portion land extendspart way into the boss 6. The bottom wall of the groove is formed with aseries of gripping ribs or corrugations 8, which series extends aroundthe upper end of the said opening 7, as shown in Fig. 4 of the drawings.The inner end of the portion 3 of each section is provided with atransversely "extending recess or groove 9 which is transversely concaveand the intermediateportion of the bottom wall of which'islongitudinally convex, as indicated at 10, the said portion 10 beingformed:

with transversely extending ribs or corrugations 11. The section isformed with an opening 12, corresponding in function to the opening 7,and this opening 12 terminates at its outer end at the base of thesection and at its inner end at the middle of the portion 10. In orderto permit of the insulator being disposed withthe outer end of either ofits sections abutting against the surface upon which it is to besupported, and the insulator being firmly held in place, even though thesurface be more or less uneven, the outer or basal end of each sectionis provided with a plurality of lugs 13.

Figs. 2 and 3 of the drawings illustrate clearly the manner in which theinsulator sections are to be assembled and by reference to thesefigures, it will be observed that, when the sections are in assembledrelation, the inner end of the portion 3 of each section Will oppose theinner end of the body portion 1 of the other section. It will further beobserved by reference to the said figures, that the openings 7 and 12are located at opposite sides of the longitudinal axis of the insulatoror, in other words, these openings in each section are located atopposite sides of the middle of the inner end of the section consideredas a whole.

.Figs. 1 and 3 illustrate the manner in which a'conductor'wireis to bedisposed between the sections, and byreferenceto these figures, it willbe observed that the said wire. indicated by the numeral 14, is laidwithin the groove 4 in one section and securely clamped against the wallof the groove and between the flange 5 and the boss 6 by the ribbedsurface of the portion 10 and by the walls of the groove 9. It willtherefore be apparent that the conductor wire is kinked in thedirectionof'the outer side or circumferential surface of the insulatorand also in the direction of one end thereof, and that for this reasonit will be securely and firmly held and prevented from slippinglongitudinally between the sections comprising the insulator. WVhen thewire has been thus disposed between the sections, a nail or othersecuring element 15 is inserted through the openings in the sections,other than the ones'which terminate at the gripping surfaces betweenwhich the wire is.

placed. It will be apparent therefore that the nail or other securingelement is located a greater distance from the gripped portion of theconductor wire than would be the case if but a single nail opening wereprovided and located axially of the insulator, and that furthermore,there is a maximum thickness of the insulating material between thesecuring element and the gripped portion of the wire. It will also beapparent that, inasmuch as the inner face of the portion 3 of eachsection is inclined or obliquely disposed, these surfaces will firmlycontact when the sections are assembled and the insulator, as a whole,will possess greater strength than if the said surfaces were located inplanes at right angles to the ends of the respective sections. It willbe understood'of course that, inasmuch as the sections are ofcounterpart form, the

securing element may be passed through either of theopenings providedfor its rep V Fig. 5 illustrates the manner in which the insulator maybe employed when it is desired to afford additional support or anchoragefor the conductor wire. Inthis instance, the conductor wire is disposedbetween the sections of the insulator in the manner described inconnection with Figs. 1. and 8 of the drawings, as is also the securingelement 15. In this instance,however, a binding or anchoring. wire 16hasits intermediate portion disposed between the other gripping surfaces.of the sections and passed around thesecuring elementand the endportions of this wire are lashed about the conductor wire at oppositesides of the insulator, or, in other words, around the conductor wire atpointswhere it leaves the insulator. 7

Having thus described "the invention, What is claimed as'new is:

'1. An insulator comprising counterpart sections, each section beingprovided at its matching end with wire gripping surfaces locatedatoppcsite sides of the center of the said end,each section being formedwith longitudinally extending openings for the reception of securingmeans for holding the sections assembled upon a support, the inner endsof the said openings terminating "at the gripping-surfaces.

2. An insulator comprising counterpart sections, each being provided atits inner end with relatively laterally and longitudinally offsetgripping surfaces, the inner surface-of the offset being obliquelydisposed and each section being formed with openings -;for the receptionof securing means, the said openings being relatively displacedlaterally with respect to the said oblique surface of the offset.

3. An insulator comprising counterpart sections, each including a;bodyportion-provided with a portion offset later-ally and longitudinallywith respect to theinner end of the body portion, thein'wardlyzpresented surface of the offset portion being-obliquelydisposed and the said body portion and the said offset portion beingformed with openings for the reception of asecuring element, the innerend of the body portion and the inner end ofthe offset portionbeingprovided with gripping surfaces.

4. An insulator comprising counterpart sections, each sectionbeing-provided at its matching end with relatively'offset grippingsurfaces, one of said surfaces constituting the bottom wall of alaterally arcuate-groove and the other gripping surface constitutingthe'longitudinal convex surface of a transversely extending groove,

5. An insulator comprising counterpart sections, each includingrelatively offset wire gripping surfaces, one of such surfaces Intestimony whereof vve aflix our signabeing formed with a roove curvedlaterally tures in presence of two witnesses. in an outward direction,and the other sur- VILLIAM J. CURRY [L SJ face being formed with agroove chordal to V 5 the circumferential surface of the section,WILLIAM ANDREWS the bottom wall of the last-mentioned groove Witnesses:being convex in a direction longitudinally E. A. BOUGH, of the groove. Vv 1 M. BATEY.

Copies 0! thin patent may be obtained tor iive cents each, by addressingthe Commissioner ot Patents,

. Washington, D. 0.

